JPS5918834A - Drive apparatus of large rotary structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a driving device for a large rotating structure that is effective when applied to a rotating observatory, a rotating theater, etc.

A rotary table of a conventional large rotating structure consists of a plurality of freely rotating vertical rollers (with axes of The rotary table was supported by a rotary table (horizontal) and rotated concentrically with the rotary table floor, guided by a plurality of horizontal guide rollers for maintaining rotational motion.

The conventional rotary table was rotated by a vertical driving roller provided between vertical rollers. This drive roller is driven by a motor via a speed reducer, and its driving force is based on the frictional force between the drive roller and the horizontal surface of the lower surface of the track rail due to the partial weight of the rotary table applied to the drive roller. However, if the load distribution state on the table changes, the weight applied to the drive roller changes and the frictional force changes, resulting in a drawback that stable driving cannot be performed.

In order to eliminate the above-mentioned conventional drawbacks, the present invention aims to obtain stable driving force regardless of changes in load, and uses a friction rail between two horizontal rollers (with vertical axes). A sliding device is built into the drive unit base to prevent meandering caused by the friction rail's roundness error.
It is an object of the present invention to provide a drive device for a large rotating structure in which the drive device horizontally moves and follows the drive device, so that no unnecessary force is applied to either the friction rail or the drive device.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a rotary table drive device showing an embodiment of the present invention, FIG. 2 is a plan view, and FIG. 3 is a side view. In the figure, the drive roller (1) is a reducer (2), and a pulley (3).
and (4), and is driven by a motor (5). The motor (5) is installed on a slide base (6), and its position can be adjusted using a handle (7). Also, reducer (2) and slide base (6)
) is installed on the drive stand (8).

On the other hand, the support shaft 00) of the driven roller (9) is connected to the pressure bonding arm 0
The driven roller (9) is fixed to the central part of υ, and rotatably supports the driven roller (9) via a bearing built into the driven roller (9). - One end of the crimp arm (11) is connected to the drive base (
The crimping arm (11) is connected to a bracket a21 fixed to a bracket a21 by a pin (13), and the crimp arm (11) can rotate around the pin θ3). The other end of the crimp arm 0υ is connected to a crimp spring guide rod 05) via a pin 04).

The crimp spring guide rod 05) is inserted into the crimp spring (161), and one end of the crimp spring αG) is supported by the bracket 07) fixed to the drive base (8), and the other end is inserted into the crimp spring guide rod (161). Nando's (18) screwed into 15)
) is compressed by the tightness of the screw. As a result, the pressure arm 01) is drawn toward the drive roller (1), and a compressive force is generated on the friction rail 09) sandwiched between the driven roller (9) and the drive roller (1).

In addition, if unnecessary force is applied to the rollers due to the circularity error of the noriction rail α mark, etc., the drive base (8) and plywood (2)
The drive base (8) slides on the plywood (20) and moves horizontally due to the sliding bearing 0υ installed between 0 and 7 and the sliding bearings (22) installed on the side and top surfaces of the drive base (8). However, unnecessary force acting on both the friction rail (1!Jl) and the drive device can be avoided.

Four bearing enclosures (23) are fixed to the plywood (2 (II) to guide the drive platform (8) in the horizontal and vertical directions when it slides. Therefore, the rollers (1) and (9) Since a constant compressive force always acts between the table floor (two friction rails connected to the rotary table and the two friction rails provided concentrically), a stable driving force can be applied to the rotary table.

Next, the overall structure of the rotary table is shown in Figures 4 and 5.
To explain with a diagram, the rotary table floor (2 forces are connected via a track rail (railway) and a plurality of vertical rollers (
2(i). The track rail is a link-shaped thing connected to the bottom surface of the rotary table floor (24).
Vertical roller C1! ■The contact area with has a smooth horizontal surface.

In addition, the rotary table floor (2) maintains the rotational movement with respect to the concentric center by the following mechanism. Namely, a friction rail (19) with a smooth vertical surface formed in a ring shape is used.
The rotary table floor (241) is connected at the lower surface, and a plurality of horizontal guide rollers (28) are arranged so as to be inscribed in the vertical surface of this friction rail (1).

Therefore, friction rail a old ma horizontal guide roller (2
The rotational movement is maintained concentrically by being guided in this direction. In addition, vertical roller (26+
, horizontal guide rollers (28) each have a built-in bear link and rotate freely.

As explained in detail above, the present invention is constructed so that the friction rail is sandwiched between the driving roller and the driven roller with a constant force using a pressure spring, and if unreasonableness occurs, the driving platform is slid, and the driving roller and the driven roller are The rollers are moved to avoid applying unnecessary force, but even in that case, the driven roller is pressed toward the driving roller by the force of the spring and follows, so a stable driving force can be obtained, and the effect is extremely large. It is.

[Brief explanation of the drawing]

FIG. 1 is a front view of a rotary table drive device showing an embodiment of the present invention, FIG. 2 is a plan view of the same, FIG. 3 is a side view of the same, and FIG.
Figure 1 shows the entire rotary table showing an embodiment of the present invention.
FIG. 5 is a perspective view showing the underfloor mechanism of the main part. Description of the main parts of the figure l... Drive roller 8... Drive base 9... Followed roller 10... Support shaft 11. ,, crimp arm
121.14...Pin 15...Crimp spring guide rod 16...Crimp spring 19...Friction rail 20...Bed plate 21.22...
Plain bearing patent applicant Mitsubishi Heavy Industries, Ltd. 173-

Claims (1)

[Claims] In a large rotating structure having a rotating table, there are a friction rail fixed to the underside of the rotating table floor and provided concentrically with the table, a drive stand provided horizontally movably on the plywood via a sliding bearing, and the same. It is characterized by comprising a drive roller supported on a drive stand and abutting one side of the friction rail, and a driven roller supported on the drive stand and biased by a spring so as to abut the other side of the friction rail. Drive device for large rotating structures.